Night-latch.



D. W. WEED.

NIGHT LATCH.

APPLICATION FILED MAY27, 1912.

1,042,062. Patented Oct. 22, 1912.

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UNITED STATES PATENT OFFICE.

DAVID WALTER WEED, OF TERRYVILLE, CONNECTICUT, ASSIGNOR TO EAGLE LOCKCO., OF TERRYVILLE, CONNECTICUT, A CORPORATION.

NIGHT-LATCH.

Specification of Letters Patent.

Patented Oct. 22,1912.

Application filed May 2'7, 1912. Serial No. 700,043.

T 0 all whom it may concern:

Be it known that I, DAVID WALTER WEED, a citizen of the United States,residing at Terryville, in the county of Litchfield and State ofConnecticut, have invented a new and useful Improvement inNight-Latches; and I do hereby declare the following, when taken inconnection with the accompanying drawings and the characters ofreference marked thereon, to be a full, clear, and exact description ofthe same, and which said drawings constitute part of this application,and represent, in

Figure 1 a plan View of a night latch constructed in accordance with myinvention. Fig. 2 a sectional view on the line a?) of Fig. 1. Fig. 3 aside view of the tubular ward detached. Fig. 4 a sectional view on theline 0cZ of Fig. 3. Fig. 5 a broken View showing the outer end of theroll-back with the tubular ward removed. Fig. 6 a plan view of the keyadapted to co-act with the tubular ward for operating the rollback.

This invention relates to an improvement in night latches, that is,latches which may be operated from one side by a knob and from theopposite side by a key. In the usual construction of these latches, atumbler casing is attached to the inner plate which casing carriestumblers and washers between them, and means are provided for holdingthe washers against rotation, the tumblers being bitted corresponding tothe key adapted to operate the lock and so that only the proper key mayoperate the lock.

The object of this invention is to dispense with disk-like tumblers andwashers; and the invention consists in the construction hereinafterdescribed and particularly recited in the claim.

In carrying out my invention, I employ a latch case of usualconstruction containing suitable latch mechanism for operating the latchbolt- 3 either through a knob (not shown) on one side of the latch, orthrough a roll-back 4 within the casing, which rollback is adapted to beturned by a key 5. Connected with the casing around the hub 6 of theroll-back is a tubular ward 7 formed with a series of inwardlyprojecting teeth 8 adapted to co-act with the bittings 9 of the key.These teeth may be varied in width and project to greater or less extentinto the tubular ward, and the bittings of the keys will correspondthereto so that a great range of changes may be secured. The tubularward 7 will be inclosed by a shell or escutcheon 10 provided at itsouter end with the usual key-way 11 in line with the tubular ward, thetubular ward being held in place by the outer end of the escutcheon andby means of lugs 12 at the inner end entering notches 18 in theback-plate 14 on opposite sides of the hub 6 of the roll-back.

I claim A night latch comprising a casing and a back-plate, a roll-backmounted in said plate, a tubular ward surrounding the roll back outsidesaid plate and projecting outward therefrom, said tubular ward formedwith inwardly projecting teeth, said tubular ward formed at its lowerend with lugs, and the plate formed with recesses to receive them, andan escutcheon set over said tubular ward and connected with said plate,the escutcheon bearing at its outer end on the outer end of the tubularward, and the outer end of the escutcheon formed with a keyway openinginto the tubular ward.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

DAVID WALTER WEED.

Witnesses:

GEO. LANGDON, OTIS B. HOUGH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

